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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 15 — Jul. 20, 2009
  • pp: 12323–12331

Circularly polarized unidirectional lasing from a cholesteric liquid crystal layer on a 1-D photonic crystal substrate

Byoungchoo Park, Mina Kim, Sun Woong Kim, and In Tae Kim  »View Author Affiliations

Optics Express, Vol. 17, Issue 15, pp. 12323-12331 (2009)

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We present the results of a study of highly circularly polarized unidirectional lasing emission from an organic lasing device that consisted of a dye-doped cholesteric liquid crystal (CLC) layer on a 1-dimensional (1-D) photonic crystal (PC) reflecting mirror substrate. Unidirectional lasing was demonstrated successfully for this device structure at the wavelength of the high-energy band edge of the CLC layer. It was also shown that circularly polarized lasing emission was produced from the lasing device at a low lasing threshold of 2.5 mJ/pulse. The handedness of lasing light corresponds to the handedness of the used CLC layer with a high ratio of intensity between right- and left-handed circularly polarized lasing light over of up to 3.7. These results show that the CLC/1-D PC device enables unidirectional lasing with highly circularly polarized laser emission.

© 2009 Optical Society of America

OCIS Codes
(160.3710) Materials : Liquid crystals
(160.4760) Materials : Optical properties
(350.4238) Other areas of optics : Nanophotonics and photonic crystals
(160.5293) Materials : Photonic bandgap materials

ToC Category:
Photonic Crystals

Original Manuscript: April 7, 2009
Revised Manuscript: June 16, 2009
Manuscript Accepted: June 23, 2009
Published: July 6, 2009

Byoungchoo Park, Mina Kim, Sun Woong Kim, and In Tae Kim, "Circularly polarized unidirectional lasing from a cholesteric liquid crystal layer on a 1-D photonic crystal substrate," Opt. Express 17, 12323-12331 (2009)

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